Originally Posted by Kotykeith

i'm sorta new to the hobby about 4mos andI have recently purchased a savage xl. was a previouse savage 25 owner.

My issue I am having is that when I hit the throttle front wheels will spin but back wheels don't move. But if i spin wheels by hand all the wheels will move as normal. I have takin the transmission apart but didn't find any flaws no shredded gears everything seems to work as it should please help...

Originally Posted by savagesam

9/10 times its the grub screw missing in the pinion hub, look at the front of the rear diff bulk head and see if the hub turns when the car is running off the ground and if so then that is the problem the drive train is working fine but with out the grub screw holding the hub to the pinion the rear diff just wont turn over.....good luck